Added ShaderManager class, that allows for postprocessing and shaders.
Implemented ShaderManger and Postprocessing
Loaded In Shader for Drawing
Merge branch 'master' of https://github.com/liam-middlebrook/Navier-Boats

Conflicts:
	Navier-Boats/Navier-Boats/Navier-Boats/Game1.cs
Merge branch 'master' of https://github.com/liam-middlebrook/Navier-Boats